Atomic number: 84
Category: post-transition metal (but disputed properties)
Density at 25°C: solid: density: between 9.196 and 9.398 g·cm−3
From polonium onwards, the elements are essentially all radioactive and unstable to varying levels. Polonium is highly toxic and radioactive producing alpha particles(helium nuclei). It can be used industrially as a neutron source for measuring analysis.
It was discovered in 1898 by Marie Curie and Pierre Curie.
Polonium-210 has been found in various parts of the food chain including in tobacco.
Use, natural applications or common combinations:
- heat energy source for some spacecraft
- was used as part of brushes for anti static purposes for film
- Standard atomic weight: about 209
- Melting point: 254 °C
- Boiling point: 962 °C
- Radioactivity: all radioactive most by alpha particles
- 208Po half life 2.898 years
- 209Po half life 103 years
- 210Po half life of 138 days to become 206Pb